How do I change the reading between Fahrenheit and celcius on this thermometer? It's the baby blue and white one, with a big button that switches on and takes the reading and a small button with an arrow coming out of a head that seems to do nothing. No mention of it on the mothercare site and it's not the model mentioned in previous threads here. Any ideas? There must be someone on here with the instructions. It seemed like everyone was using this model about 4 years ago ...
thankd for any help!